From patchwork Tue Feb 22 07:30:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12754609 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3DCD8C433F5 for ; Tue, 22 Feb 2022 07:22:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230478AbiBVHWm (ORCPT ); Tue, 22 Feb 2022 02:22:42 -0500 Received: from gmail-smtp-in.l.google.com ([23.128.96.19]:48784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230401AbiBVHWl (ORCPT ); Tue, 22 Feb 2022 02:22:41 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2BB775E157; Mon, 21 Feb 2022 23:22:16 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D6EE7B81886; Tue, 22 Feb 2022 07:22:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5C47C340E8; Tue, 22 Feb 2022 07:22:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645514533; bh=N5OOodQM5orTfwFxfN2SOmhucLQF1RkDS9TqftjrLNg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cMzj8NyG13mkouqjlCErqMXPMUgHZK2BPGgXvA0o1EAfLn5km3WFeOJYsiPsz0qzu dDNf631WPWQKnFxNDkgmfChwk1FTi9yLW4m4VSUSHSqMfqn9Y9DJxTOuCuc6wur+Io cd6QoATakgXTVY1vz4ryVo+13Fsrso3yrB+KZJPYg8uWwyjczm77R+x0JW2AvrU1SU atlBAmMvC4n637B+VhYLe9H6PxD2HSQwq9xlp8GVMvJejbfpBNjQfvImcP1X4H+TYQ 9+MwfW4su7gXri2U5UDug1SmYQWqiGNXYv7p0kZ+4J+ZpgUf7UZMgQ0VtBohgz0kmq 99BDSUeCFVWMQ== Date: Tue, 22 Feb 2022 01:30:06 -0600 From: "Gustavo A. R. Silva" To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Adaptec OEM Raid Solutions , "James E.J. Bottomley" , "Martin K. Petersen" , linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH 4/8][next] scsi: aacraid: Replace one-element array with flexible-array member in struct sgmap64 Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org Replace one-element array with flexible-array member in struct sgmap64. Also, make use of the struct_size() helper and refactor the code according to the flexible array transformation in struct sgmap64. This issue was found with the help of Coccinelle and audited and fixed, manually. Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/79 Signed-off-by: Gustavo A. R. Silva --- drivers/scsi/aacraid/aachba.c | 15 +++++---------- drivers/scsi/aacraid/aacraid.h | 2 +- 2 files changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c index 5014d8374916..02b75a2c3a88 100644 --- a/drivers/scsi/aacraid/aachba.c +++ b/drivers/scsi/aacraid/aachba.c @@ -1281,7 +1281,7 @@ static int aac_read_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3 static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32 count) { - u16 fibsize; + size_t fibsize; struct aac_read64 *readcmd; long ret; @@ -1297,9 +1297,7 @@ static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u ret = aac_build_sg64(cmd, &readcmd->sg); if (ret < 0) return ret; - fibsize = sizeof(struct aac_read64) + - ((le32_to_cpu(readcmd->sg.count) - 1) * - sizeof (struct sgentry64)); + fibsize = struct_size(readcmd, sg.sg, le32_to_cpu(readcmd->sg.count)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); /* @@ -1413,7 +1411,7 @@ static int aac_write_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32 count, int fua) { - u16 fibsize; + size_t fibsize; struct aac_write64 *writecmd; long ret; @@ -1429,9 +1427,7 @@ static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, ret = aac_build_sg64(cmd, &writecmd->sg); if (ret < 0) return ret; - fibsize = sizeof(struct aac_write64) + - ((le32_to_cpu(writecmd->sg.count) - 1) * - sizeof (struct sgentry64)); + fibsize = struct_size(writecmd, sg.sg, le32_to_cpu(writecmd->sg.count)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); /* @@ -2263,8 +2259,7 @@ int aac_get_adapter_info(struct aac_dev* dev) dev->scsi_host_ptr->sg_tablesize = (dev->max_fib_size - sizeof(struct aac_fibhdr) - - sizeof(struct aac_write64) + - sizeof(struct sgentry64)) / + sizeof(struct aac_write64)) / sizeof(struct sgentry64); } else { dev->a_ops.adapter_read = aac_read_block; diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index bcf97c1b8c0c..573cb36c2e15 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -516,7 +516,7 @@ struct user_sgmap { struct sgmap64 { __le32 count; - struct sgentry64 sg[1]; + struct sgentry64 sg[]; }; struct user_sgmap64 {